Did all the MK2 Raleigh's use that Aero style frame?
No, not a Tange made full cro-moly aero frame they didn't. That was only on the top of the range Aero Pro Burner. The Koizumi framed Mk2 Cromo Burner is also quality.
All other Mk2's all have the Raleigh made(?) aero oval tubing with the R cutouts on the fork and rear dropouts, and are rather less well thought of round these here parts. Of course we lubs em on Burnerworld